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Feb. 5 1924. Re.- 15,753

E. RUUD WATER HEATER Original Filed May 6, 1912 Remnant. s, 1924.

I UNITED STATES "PATENT orrlcs anwnv noun, o'r rrr'rsnuaon, rmmsnvama, assmnoa to noon lunvrac'rua- IHG OOIILR'Y, O1 CAMDEN, NEW JERSEY, A CORPORATION 01' NEW JERSEY.

WATER HEATER.

Original Io. 1,050,504, dated January 14, 1913, Serial Io. 695,481, fled Kay 8, 1912. Application (or release fled Iovember 22,

To all whom it may concern:

Be it known that I, EDWIN RUUD, a citizen of the United States of America, and a resident of Pittsburgh, Pennsylvania, have invented a new and useful Improvement in Water Heaters, which invention is fully set forth in the following specification.

Considerable trouble has been experienced with gas burning instantaneous water heaters due to the bending and mutilating of the relatively thin copper or other coils which are ordinarily supported b extending their unprotected extremities t rough openings in the casing and into position .to connect with the circulating pipes, the weight of the coil bending and sometimes rupturing the thin metal extremities which bear on the comparatively thin metal of the casing. Also rough or careless manipulation by workmen when installing'heaters and con necting the circulating pipes frequently results in bending and straining the coils. Furthermore, the vibrating or shaking of the coils when the heaters are being handled or shipped bends and strains their supportin extremities.

he ob'ect of the invention is to overcome these difl iculties by. relieving the coil extremities of all distortin strains, and by providing for permanent fixing the coils within the casing so that it is quite impossible for them to move or become displaced.

A further object is to so construct the casin that the coil or coils may be placed therein with the holding devices located on the coil extremities. in the preferred adaptation two coils bein employed which are connected by manifo ds at their u r and lower ends before being inserted in .the casing.

In the accompanying drawings,

Fig. 1 is a vertical section the casing and elevation of the coils of a water heater constructed in accordance with the invention, said view being taken on lines 11 of Fig. 2;

Fig. 2 is a top plan with the casing cap removed;

Fig. 3 is an elevation of the casing before the coilsare positioned therein;

Fig. 4 is a vertical section through the lower extremity of oneof the coils and its sustaining coupling;

Fig. 5 is a sectional detail of the holding the cylindrical two-part shell 1922. Serial lb. 602,848.

device for the cou lings at the lower extremities of the coi s, taken on line 5-5 of Fi 3; and d igs. 6 an are views in erspective of said holding device' and p Fig. 8 is a detail of one of the coil exlfzreigities before it is connected to a mani- Referring to the drawings 2 designates or casing of a gas heated coil water heater with a flue connecting cap 3 fitting its u per end. For the two-coil type of heater liere shown the top edge of t e casing is formed with the two seat-forming notc es 4, which are referably flanged as shown to provide ing surfaces, and which are closed when cap 3 1s in place. The lower portion of the casing is formed with an opening or passa way 5.

n the present adaptation two circulating coils 6 and 7 are located within thecasing in nested relation, the coils being usually formed of relatively thin copper tubing. The coils are so arranged that their u per laterally projecting extremities 6' an 7', respectively, are in parallel relation, and the same is true of their lower extremities. each extremity of each coil is a bushing or combined su porting and couplin nut 8 into which t e coil end is exten ed with the extremity thereof flared outwardly at 9 against the "eled internal seat 9' of the coupling, being clamped and sealed on the seat by the tapered extremit 10' of manifold 10. One of these manifolds connects the two upper couplings 8 and another like manifold t e two lower couplings, the circulating pipes connecting with these manifolds, as Wlll be understood.

The exterior of each coupling nut 8 ll grooved at 11 to fit notches 4 at the upper end of the casing, also seats 5' of openm 5, being secured on the latter by the progngsd or forked plate 12. This plate is curv to fit the exterior of easing 2 and is formedwith two downwardly extendi prongs 13, which engage the exterior of t e casin and the central inward ofl'set rong 4 which engages the inner surface t ereof as shown in Fig. 5, prongs 13 bein sha to fit the coupling grooves 11. en in position, late 12 is moved inwardl beneath stop 5 projecting from the casing which holds it in place. The coupling nuts may be placed loosel on the coil extremities before or after t e coils are assembled the bell or flare 9 preventing them from droppin oil, see Fig. 8.

en, as in the present adaptat1on, two coils are employed having laterally pro ecting extremities, they are assembled or nested through casing openin 5, and its couplin are fixed on seats 5'. asing 2 is then close cap 3 is applied, and locking plate 12 in serted, thereby rigidly securing the coils and their connections within the casing and so permanently and rigidly holding'them that they cannot loosen or become displaced, at the same time protecting the thin metal tubing of the coils from distorting or dentin strains. As the couplings are rigid with the casing, the latter relieves the coils.

of all strains that may occur when connecting the circulating ipes. Also, with the coils permanently he d they are maintained in proper position relative to the burner and the ascending heat currents, in-

- curring constant maximum efiiciency.

What is claimed is 1. In a water heater, the combination of a casing having a plurality of openings in the lateral wall thereof, one of said openings being in the form ofa notch in the upper edge of said wall, a coil of relatively t in tubing within the casing, combined coupling and supporting devices of tubular form engaging the ends of the coil and seated in said openings substantially at right angles to the longitudinal axis of said coil, water circulating connections at the exterior of the casing uniting with said devices, and means removably holding the devicesseated in the casing openings, whereby said coil is supported in said casing by means of said devices.

2. In a Water heater. the combination of a casing having openings therein, one of said openings being in'the form of a notch in the upper edge of said wall, the casing adjacent the lower sides of said openings forming seats and the 'upper portions of said 0 n'ings being adapted to admit coupling evices which rest on the seats, a coil of relatively thin metal within the casing,

coupling devices at the extremities of the.

coil projected through the casing openings and resting in the seat-forming portions thereof, and means holding the couplings seated in said openings, the ortions of the couplings at the exterior of the casing being adapted to unite with water circulating con- 4. In a water heater, the combination of a casing provided with an opening, a coil of pipe within the casing, a couplin at an extremity of the coil, the cou ing being ved exteriorly and adapte to extend t rough the casing opening, and removable means entered in the coupling groove for holding the coupling in position on the cas- 1 5. In a water heater, the combination of acasing having an opening in the lateral wall thereof, nested coils of pipe within the casing having two of its ends in registry with said opening a manifold, couplings ada ted to detachably connect said ends to sai manifold and secure said ends to the lateral wall of the casin thereby neventing relative displacement o the assem led parts, and means for removably confining said couplings in said opemng.

6. In a water heater, the combination of an upright casing having vertically separated openings in the lateral wall thereof, a coil of pipe within the casing havi its opposite ends in registry with said openings. supporting couplings, one for each end of said coil, positione in said openings, and manifolds engaging said couplings and rigidly securing the ends of said coil to said couplings.

7. In ahwater healtler, the combirliiition of an uprig t casing avingwertica y se ratedo nings in the lateral walls there f, a coil 2 pipe within the casing'having'its oppositgf ends extending substantially at right ,ingles to the longitudinal axis of said coil, cou lings engaging the ends of said coil and ormm continuations thereof, and means holding t e cpuplings removably fixed in the casing openings, said couplings being adapted to supportsaid coil in said 8. In a water heater, the combination of an upright casing provided with vertical] separated openings in the lateral w thereof, one of said openings being in the form of a notch in the upper edge of said wall, two upright coils in the casing-one coil within the other, the ends of said coils extending substantially parallel one with the other at substantially right angles to the longitudinal axes of said coils, support.

'ing couplings at the up r and lower extremities of the coils, an means removably securing the couplings within the casing openings.

9. In a water heater, the combination of an upright casing open at the top and notched downwardl to receive a coupling, the lower portion 0 the casing formed-with an opening through which a coupling is adapted to pass, a coil of pipe within the casing, couplings at the upper and lower extremities of the coil with the upper coupling adapted to fit the casing notch and the lower couplin adaptedto extend throu h the opening in the lower portion of t e casing, means for securing said lower cou pling to the casing, and a cap fitting the upper end of the casing.

10. In a water heater, the combination of a casing having two openings which form coupling seats, the lower portion of the easing formed with an 0 ning two coils in the casingone coil within the other, couplings at the upper extremities of the coils adapted to fit the seat-forming openings, a manifold connecting the upper couplin couplings at the lower extremities of t e coils with the couplings extending through the casing passageway, a manifold connecting the lower couplings, and means for removably securing the casing opening.

11. In a water heater, the combination of a casing, coils of pipe therein, connections extending through the casing for the u per ends of the coils, the lower portion 0 the casing formed with an opening, exteriorly grooved couplingls at the lower extremities of the coils wit the couplings extending through said opening, and a holding device ellilgaging the grooved couplings and remova y secured to the casing for holding the couplings within said opening.

12. In a water heater, the combination of a casing, coils of pipe therein, connections extendin through the casing for the u per ends of he coils, the lower portion 0 the casing formed with an opening, exteriorly grooved coizplings extending through said opening, an a proreiged holding device embracing the v coupling with one er couplings in the prong thereo entered in the opening andengaging the inner surface of the casing and two rongs thereof engaging the exterior of e casing.

13. In a water heater, the combination of a casing, a plurality of relatively thin walled coils within said casing having the ends thereof extending substantiall at right angles to the longitudinal axes of said coils,

a plurality of couplings, one for each end of each of said coils. engaging the ends of the coils and projecting through the lateral wall of said casing, a manifold engaging a pair of adjacent couplings, and means reniovably securing said couplings to said walls, said coils being supported in said casing by said couplings.

14. In a water heater, the combination of a casing having vertically separated openings in the lateral wall thereof, a coil in said casing having the o posite ends thereof extending substantial y at right angles to the longitudinal axis of said coil, the ends of said coil being flan d at their extremity, couplings, one for eac end of said coil, having a seat interiorly thereof for the flanged end of said coil, manifolds threaded into said couplings for rigidly securin the flanged ends of said 0011 within sai couplings, and means detachably securing said couplings in said openings.

15. In a water heater, the combination of a casing having two openings which form coupling seats, the lower portion of the easing formed with an openlng, said openings being formed in the lateral walls of said casing, two coils in the casing-one coil within the other, couplings at the upper extremities of the coils adapted to fit the seat-forming openings, a manifold connecting the upper couplings, cou lings at the lower extremities of the coi with the couplings extending through the casing passageway, a manifold connecting the lower couplings, and means for removably securing the lower couplings in the casing open ng.

16. In a water heater, a casing having vertical walls with a plurality of seat-form-.

ing notches in-the upper edge portion thereof and an opening vertically beneath said notches, in combination with a multiple coil within said casing with the ends of the coils extending at right angles to the axis of the coil, couplings on said ends seated respectively in said seat-forming notches and said opening, a cap secured to the top of said casing and holding said couplings in said seat-forming notches, and means retaining the lower couplings firmly in position in said opening.

17. In a water heater, a casing having seat-forming notches in the upper edge portion thereof and an opening through the casing in a plane below said notches, a plurality of coils within said casing with the ends of the coils projecting at a substantial angle to the wall of said casing, couplings on the ends of said coils, said couplings being provided with annular grooves, a cap secured to the top of said casing and having a lug portion engaging in the annular grooves of the upper couplings, and a removable forked plate straddling the couplings on the lower ends of the coils and provided with shoulders en agin the grooves in said couplings, sa1d orke plate having a portion engaging the inner surface .of the casing and a portion engaging the upper and the lower end of said coil, each of said couplings being rovided with an annular groove engage b seat-forming portions of said notch an said opening,

means removably secured to said casing andenga ing the annular oove of the upper coup ings, and remova le means having a rtion engaging the annular groove in said owercouplin whereb the coil is firmly secured in position within said casing.

In testimony whereof I have signed this specification.

EDWIN RUUD. 

